Users connecting to Outlook locally are also having the same popup. If you’re like me, you’ll probably go through the different possibilities in your mind and try to zone in on the most likely cause of the problem. Outlook will restore the connection when possible. Typically about 4 of each happen in a half hour window. Their machine maintains connection to the internet but outlook can sit there for 5 mins stuck in this hissy fit, nothing large being sent/received. Connection to Microsoft Exchange has been lost. Outlook must be online or connected to complete this action. "Connection to Microsoft Exchange has been lost. Outlook will restore the connection when possible.

Outlook will restore the connection when possible."

CAS servers in the office have been checked and all is fine.

Well, “connection to Microsoft exchange is unavailable” is one such cryptic message that doesn’t tell you much about why there is no connection. If you're an admin with multiple users reporting problems, you also should check for service issues with Office 365. Then seconds later "Connection to Microsoft Exchange has been restored." The connection to the Microsoft Exchange Server is unavailable. Outlook will frequently lose connection to exchange and then flash up connection to microsoft exchange has been restored. Event id 26 gets logged on the client every 10 sec Connection to Microsoft Exchange has been lost. Right-click on the search result titled cmd or Command Prompt and click on Run as administrator to … The Microsoft Exchange Server computer is not available. Connection to Microsoft Exchange has been restored. Fix software update and profile issues Out-of-date software and corrupted Outlook profiles are two of the most common issues that can prevent you from sending and receiving email. Either there are network problems or the Microsoft Exchange Server computer is down for maintenance.